Davit-fall attachment.



F. W. KROGH.

DAVIT FALL ATTACHMENT.

APPLiCATlON man JAN. 16. 1915.

Patented Dec. 21, 1915.

2 SHEETS-SHEET WITNESSES.

7% QJM ATTOR N EY.

COLUMBIA- PLANOGRAPH co., wAsHlNuTON, 11v 6.

F. W. KROGH.

D'AVIT FALL ATTACHMENT.

APPLICATTON FILED JAN. 16, 1915.

1,165,183. Patented Dec. 21, 1915.

2 SHEETS-SHEET 2.

W|TNESSES. INVENTOR- flaiiafiw ATTORNEY.

F'ERDINAND IV. KROGH, OF SAN FRANCISCO, CALIFORNIA,

DAVIT-FALL ATTACHMENT.

Specification of Letters Patent.

Patented Dec. 21, 1915.

Application filed January 16, 1915., Serial No. 2,577.

To all whom it may concern Be it known that I, FERDINAND WV. Kiioori,

the boats may be released quickly and easily without danger to the man releasing them and without danger of the boat being released at one end and not at the other.

To the above ends I make use of two hooks at each end of the boat, one hook connected to the boat and the other to the davitfall and between these hooks I employ a roller which may be toothed if desired, to engage teeth on the hooks, which roller is under control of the operator so that it may be rotated to disengage the hooks from each other or prevented from rotation to insure their continued engagement.

In the accompanying two sheets of drawings I have illustrated my device in its best form and will now proceed to describe the same. I In the drawings: Figure 1 is a side ele'va tion of a boat as it hangs suspended from the davits, showing the lower ends of the falls and my invention applied thereto. Fig. 2 is a side elevation of a central standard for supporting the controlling and operating parts of'the device. Fig. 3 is a central sectional elevation taken on the line3, 3 of Fig. 2, looking in the direction of the arrows. Fig. at is an elevation of the connecting device between the davit-fall and the boat, but with the journal bearing of the standard, attached to the endof the boat, shown in section, and with a portion of the lower hook broken away to expose the controlling roller. Fig. 5 is a view at right angles to Fig. a, showing the same parts but partly broken away in sections to show the controlling roller between the two hooks.

In these figures, 1 represents a boat and 2 I the lower ends of the falls by which it is suspended from the davits, 3 being the blocks which may be provided with the usual hooks 4., or some other form of connection.

'5 is a hook provided with an eye, 6, by

which it is hung upon the hook 4-, and having its hook portion, 7 approximately straight and provided with a series of notches, 8, which constitute, virtually, gear teeth. 9 is a companion hook provided also with a straight portion 10, having notched teeth 11, and provided with a hook, 12, adapted to engage the eye bolt, 13, of the boat. The hookl2, may, if desired, be'provided with a snap spring, 1 1, to prevent disengagement of the eye bolt, 13, and similarly the hook, 4-, may be provided with a snap spring, 15.

16 is a roller provided with teeth, 17, to engage the teeth or notches, 8 and 11, upon the hooks, 5 and 9. The roller, 16, is controlled by means of a shaft, 18. This shaft extends longitudinally of the boat to any convenient point where it meets a similar shaft coming from the device at the opposite end of the boat. At this point the ends of the shafts are squared as at 19 and inserted into a coupling block 20. The coupling block is mounted between two standards, 21, in which. the shafts have bearings, as seen in Fig. These standards are mounted upon a seat of the boat, 22, or other convenient part of the boat.

A11 arm, 23, extends downward from the coupling block 20, and near its lower end there is pivoted a lever, 24, the pivotal point of which, 25, is above the end of the arm 23. The'end of the lever, 24,.is oifsetas shown in Fig. 2, to engage its pivot, and the side of the lever engages the end of the arm 23, as seen in that figure, whereby movement of the level-in the direction indicated by the arrow will swing the arm and turn the block 20, and the two shafts 18. This 1novcment will turn the rollers, 16,.and cause them to roll the companion books, 5 and 9,

rollers, 16, is likely to give the rollers, and

through them, the shafts, the block 20, and the arm 23, a sudden throw, which might injure the operator if the lever, 24, were firmly fastened to the'said arm, but, being pivoted as shown, the arm, 23, can throw in the direction indicated by the arrow in Fig. 2, without throwing the lever with it and therefore the operator is preserved from inury.

'At 26 is a cross bar from one of the standards, 21, to the other, which cross bar supports two little brackets, 27, between which the arm, 23, is received, in its normal holding position. When in this position a pin, 28, is passed through holes in the brackets and in the arm, thus locking the latter and preventing accidental disengagedent of the boat. V

In operation the boat may be swung outward from the side of a vessel and lowered by means of the falls in the usual manner iintil it reaches a'p'rope'r point for its release.

At thispoint'the man in the boat, sitting near the standards, 21, grasps the end of the lever, 24;,- pulls out the'pin, 28, and swings the lever in the direction of the arrow shown in Fig. 2. This rotates the rollers, 16, and therebydisengages the companio fhoo-ks, 5 and Q, at both ends-of'the boat atthe same time, so that the boat is received squarely in the ivaterwvithoiit any danger of one end falling first and spilling out its contents.

29 is a stop for arm, 28; it acts also as a brace for the standards, 21. a

Byway of supporting shafts, 18, after the boat is released from the falls, standards 30, shown in Fig. 1, may be applied at each end of the boat, if desired.

31 are flanges at each side of the rollers,

16, designed to prevent its lateral displacement. 7 7

Having thus described my invention, and an embodiment of it, in the full, clear and exact terms requiredbvlaw, and knowing that i comprises novel, useful and valuable improvements in the art to which it pertains,

I here state that I do not wish to belimited -'to the precise construction and arrangement of the several parts, as herein'set' forth, as

the same ma bewarioiisly 'modified'by a I skilled 'me'chanic without departing from the spir t '01 the invention.

" 7 What I claim and desire to secure by Letters Patent of "the United States is the following, to wit:- V

l. A- davit-ital-l attachment comprising 7 companion hooks engaged together'and means between said hooks to release said engagement, one of said hooks being secured V to the-tall and the other to the boat.

2. A davit-fall attachment comprising companionhooks having a rollerinterposedv between said hooks and means ior control;

ling said roller. 1 3. A davit-it'all attachment comprising companion hooks provided with teeth upon 1 their engaging faces and atoothed roller Copies of this patent may be obtained for between said faces and engaging said teeth and means for controlling said roller.

a. A clavit-iall attachment comprising companion hooks, one connected to the fall and the other to theboat, a roller interposed between the engaging faces of said hooks, a

', shaft connected to said roller and means for operating said'shaft and thereby rotating the roller to disengage the hooks.

5. A 'davit-falll attachment comprising companion hooks, oneconnectedto the fall and the other to the boat, a roller interposed between'the en aging :taces of said hooks,..a

shaft connected tosaid roller and a lever for 1 turning said shaft and thereby rotating'the roller to disengage the hooks.

6. A davit-tall attachment comprising coin )anion hooks in pairs ateach end of a 7 heat, rollers between theengaging faces of each pair of hooks, shafts extending from saidrollers toward the middle or the boat to a meeting point, coupling blockcoiinecting the meeting ends of said shafts,

means for locking saidshafts against rotation and means for rotating both shafts wheniini-ocked, whereby both'ends of the boat are released from the fallssimultaneously. r i a V, i s

7; A, davit-fall attachment comprising v V companinnhooks arranged in, pairsat each end of the boat, means between said hooks for e'tfecting the disengagement thereof, an

arm ror effecting the operation of said means, an offset lever pivoted to said arni,

whereby the arm may be thrown inoperalii e direction by the lever but the lever will be tree in the opposite direction.

8. A davit-fallattachment comprising companion hooks, one connected to the fall and the other to the boat,ra roller interposed between the engaging faces o-fsaid' hooks, a

shaft connected to said roller and means for operating said shaft, thereby. rotating the roller to disengage the hooks and means for 1 five cents each, by addressing t u cgm nissi oner of fateiits, Washington, D. G. I a

Januar 1915' inthe aresence of witnesses.

7 v V V a 

